Music

Two small tools for musicians and producers: tap along to a beat to find its BPM (tempo) without a metronome, or look up the exact frequency in Hz and MIDI note number for any musical note across the audible range, from a low C0 up to the highest notes on a standard piano keyboard.

Both calculators run instantly in your browser with no installation, plugin or account required. Tap tempo is handy for setting a DAW's project tempo by ear from a reference track, while the note frequency tool helps with instrument tuning, synthesizer programming and everyday music theory practice.

Which tool should I use?

BPM tap tempo

Tap along to a beat with no reference number — use it when you need the tempo of a track or performance you're listening to right now. No account or download needed — just start tapping.

Note frequency calculator

Look up the exact Hz and MIDI number for a note you already know by name — use it for tuning an instrument or programming a synthesizer. It's a static reference, so the same note always returns the same result.

Frequently asked questions

What's the difference between the BPM and note frequency tools?

Tap tempo measures rhythm — how fast a beat is, based on your tapping. The note frequency tool looks up pitch — the exact frequency of a named note — from a fixed reference table. One is about speed, the other about pitch.

How accurate is tap tempo?

Accuracy improves with more taps, since the result is averaged across the intervals between them. A handful of taps gives a rough estimate; tapping along for 10-15 seconds gives a tempo close to the real BPM.

What pitch standard does the note frequency calculator use?

Equal temperament with A4 tuned to 440 Hz, the standard concert pitch reference used for most modern instruments and tuners.

Do these tools record or analyze real audio?

No. Tap tempo only measures the timing between your taps, and the note frequency tool simply looks up a value in a reference table. Neither one records sound through a microphone, so no audio ever leaves your device.